|Evidence for Two-Body Hadronic Decays of the Upsilon - S. A. Dytman|
We describe a search for hadronic decays of the Y(1S), Y(2S), and Y(3S) resonances to the exclusive final states rho pi, K*(892) Kbar, rho a2(1320), omega f2(1270), phi f2'(1525), K*(892) K2*(1430)bar, b1(1235) pi, K1(1270) Kbar, and K1(1400) Kbar. Upper limits at 90% CL are set for all these decays from all three resonances below 33x10**-6; in particular, B(Y(1S)--> rho pi) phi f2'(1525)) = (7 +3-2(stat) +-1(syst)) x 10**-6 and B(Y(1S) --> K1(1400) Kbar) = (14 +4-3(stat) +-2(syst)) x 10**-6...
|Meson Production Experiments with Electromagnetic Beams using CLAS - S. A. Dytman|
The CEBAF Large Acceptnace Spectrometer (CLAS) has been taking production data since February, 1998. It takes data for many reactions simultaneously with moderate resolution. Data has been taken for a variety of conditions with polarized and unpolarized beam and target. Preliminary results of the initial experiments run by the CLAS collaboration are shown. The connection with the study of N* resonances is emphasized.
|Evidence for the Decay $D^0\to K^+ π^-π^+π^-$ - S. A. Dytman|
We present a search for the ``wrong-sign'' decay D0 -> K+ pi- pi+ pi- using 9 fb-1 of e+e- collisions on and just below the Upsilon(4S) resonance. This decay can occur either through a doubly Cabibbo-suppressed process or through mixing to a D0bar followed by a Cabibbo-favored process. Our result for the time-integrated wrong-sign rate relative to the decay D0 -> K- pi+ pi- pi+ is (0.0041 +0.0012-0.0011(stat.) +-0.0004(syst.))x(1.07 +-0.10)(phase space), which has a statistical significance of 3...
|Measurement of Exclusive B Decays to Final States Containing a Charmed Baryon - S. A Dytman|
Using data collected by the CLEO detector in the Upsilon(4S) region, we report new measurements of the exclusive decays of B mesons into final states of the type Lambda_c^+ p-bar n(pi), where n=0,1,2,3. We find signals in modes with one, two and three pions and an upper limit for the two body decay Lambda_c^+ pbar. We also make the first measurements of exclusive decays of B mesons to Sigma_c p-bar n(pi), where n=0,1,2...
|Baryon Resonance Extraction from piN Data using a Unitary Multichannel Model - T. P. Vrana|
A unitary multi-channel approach, first developed by the Carnegie-Mellon- Berkeley group, is applied to extract the pole positions, masses, and partial decay widths of nucleon resonances. Input used are the partial wave amplitudes for the transitions from piN to eight possible final baryon-meson final states. Because the model preserves analyticity, resonances are found as poles in the T matrix. This approach is designed to handle inelastic threshold openings with minimal model dependence...
|Baryon Resonance Extraction from Pi Nucleon Data using a Multichannel Unitary Model - S. A. Dytman|
We present organization and solutions for a new analysis of all $\pi N$ elastic and the major inelastic channels to extract detailed characteristics of the contributing baryon resonances. This work is based on the work of R. Cutkosky and collaborators at CMU about 20 years ago. The model features analyticity at the amplitude level and unitarity. Results are similar to previous analyses for strongly excited states, but can vary considerably from previous analyses when the states are weak, the dat...
|Demonstration of Communication using Neutrinos - D. D. Stancil|
Beams of neutrinos have been proposed as a vehicle for communications under unusual circumstances, such as direct point-to-point global communication, communication with submarines, secure communications and interstellar communication. We report on the performance of a low-rate communications link established using the NuMI beam line and the MINERvA detector at Fermilab. The link achieved a decoded data rate of 0.1 bits/sec with a bit error rate of 1% over a distance of 1.035 km, including 240 m...